Stainless steel chain block has excellent corrosion resistance, and its core lies in the characteristics and targeted design of stainless steel material. The specific analysis is as follows:

1、 Material characteristics: Corrosion resistance principle of stainless steel

Passivation film protection

The surface of stainless steel forms a dense chromium oxide passivation film through chromium elements, which can effectively isolate oxygen, water vapor, and corrosive media such as acids, bases, and salts. For example, 304 stainless steel contains 18% chromium and 8% nickel, making it almost rust free in dry atmospheres, while 316 stainless steel adds an additional 2-3% molybdenum to further enhance its resistance to chloride ions such as seawater and salt spray.

Synergistic effect of alloy elements

Nickel: enhances the stability of stainless steel in acidic environments.

Molybdenum: specifically designed for chloride ion corrosion, suitable for scenarios such as marine engineering and chemical raw material production.

Low carbon content: reduces the precipitation of carbides in the welding heat affected zone and lowers the risk of intergranular corrosion.

2、 Design optimization: Targeted anti-corrosion structure

All stainless steel material

Except for the main shaft which needs to be made of high-strength 45 steel, key components such as chains, gears, and casings are all made of stainless steel to avoid local corrosion. For example, the all stainless steel chain hoist used in the food processing industry can prevent rust stains from contaminating products.

Seal Design

By sealing the structure to prevent corrosive media from entering the interior, the service life is extended. For example, equipment used in chemical plants needs to resist acidic gas leaks, and the sealing design can ensure that the internal gear system is not corroded.

Surface Treatment

Polishing process reduces surface roughness, reduces foreign matter adhesion, and enhances self-cleaning ability. For example, manufacturers of 304 stainless steel pipes have strict polishing requirements to prevent scratches from becoming the starting point of corrosion.

3、 Environmental adaptability: anti-corrosion performance in different scenarios

Wet environment

In high humidity places such as biopharmaceutical factories, stainless steel chain hoists can avoid the problem of carbon steel material rusting and eliminate the risk of drug contamination. For example, after using 304 stainless steel chain hoists in a certain pharmaceutical factory, the equipment lifespan was extended by three times and maintenance costs were reduced by 50%.

Chemical corrosion environment

In chemical plants, stainless steel chain hoists can resist corrosion from strong acids, alkalis, and organic solvents. For example, when repairing a reactor in an acidic gas leakage area, a 316 stainless steel chain hoist can stably lift the components and ensure maintenance safety.

marine environment

316 stainless steel chain hoist performs well in seawater and salt spray environments, and is suitable for lifting ships and ports. For example, after using 316 stainless steel chain hoists in a certain port, the equipment corrosion rate decreased by 80% and the service life reached more than 10 years.

4、 Usage and maintenance: the key to extending the anti-corrosion life

Avoid corrosion triggers

Prevent the adhesion of foreign metal particles or acidic or alkaline substances on the surface.

Avoid using in polluted air (such as those containing sulfides and nitrogen oxides).

After use on rainy days, it is necessary to wipe and apply rust proof oil in a timely manner.

Standardized operation

Overloading, diagonal pulling, or rapid pulling of chains are prohibited to prevent heavy objects from falling and damaging equipment.

Limit the height of ascent to avoid shaking caused by cargo hitting the casing.

regular maintenance

Check the wear of chains and gears every month and replace damaged parts in a timely manner.

Apply anti rust oil and lubricate bearings every quarter to ensure smooth operation.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment